Abstract
Several authors have recently studied virtual knots and links because they admit invariants arising from –matrices. We prove that every virtual link is uniquely represented by a link in a thickened, compact, oriented surface such that the link complement has no essential vertical cylinder.
Citation
Greg Kuperberg. "What is a virtual link?." Algebr. Geom. Topol. 3 (1) 587 - 591, 2003. https://doi.org/10.2140/agt.2003.3.587
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